5,7-Docosadiynoic Acid Ethyl Ester-d5 is the isotope labelled analog of 5,7-Docosadiynoic Acid Ethyl Ester (D525340); the ethyl ester derivative of 5,7-Docosadiynoic Acid (D494450) which is an amphiphilic molecule used in the synthesis of artificial cell membranes for diagnostics and therapeutics.